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Biomedical subjects

I E Timor-Tritsch

Publications and source records attributed to I E Timor-Tritsch.

At least 91 records · Page 5Linked to original sources
PubMed1989

[Vaginal ultrasonography: a new testing method in obstetrics and gynecology].

Transvaginal sonography represents a new tool for the gynecological diagnosis and decision making. The authors present theoretical and practical aspects of transvaginal sonography with special emphasis on the 6.5 MHz vaginal probe. Based on one thousand one hundred and eight examinations it is obvious that this procedure is valuable in diagnostic algorithm of ectopic pregnancy and to follow follicular growth, as well as ultrasound guided oocyte retrieval.

Congenital Abnormalities↗
PubMed1989

The use of transvaginal ultrasonography in the diagnosis of ectopic pregnancy.

Despite advances in diagnosis made by the introduction of serum beta-subunit of human chorionic gonadotropin determinations and transabdominal ultrasonography, ectopic gestations still present a major diagnostic challenge. The increased resolution of the transvaginally introduced high-frequency ultrasound transducer probes seems to solve this diagnostic problem. In this study 145 patients were referred for ultrasonographic workup because of a suspected ectopic gestation. In 38 patients a diagnosis could be made with classical transabdominal scanning. One hundred seventeen patients required additional transvaginal scanning with a 5.0 and a 6.5 MHz probe. In 98 patients a diagnosis was made during the first transvaginal scan; nine patients were rescanned within 3 days for the final diagnosis. In 56 patients, ectopic pregnancy was successfully ruled out by transvaginal scanning. Thirty-nine ectopic pregnancies were diagnosed. Only one false-positive identification was made. The sensitivity of diagnosing ectopic pregnancy by high-frequency transvaginal sonography was 100%; the specificity was 98.2%. The positive predictive value of this method was 98%, and the negative predictive value was 100%. The rate of the beating fetal heart was seen in the tube (23%). The high number of unruptured tubal pregnancies in this series (66%) suggests the possibility of an early diagnosis that may have therapeutic implications. The use of higher-frequency transvaginal transducer probes improves the diagnosis of the ectopic gestation.

Diagnosis, Differential↗
PubMed1989

First-trimester midgut herniation: a high-frequency transvaginal sonographic study.

The application of high-frequency transvaginal sonography offers new opportunities in scanning for malformations during the first trimester of pregnancy. Scanning of the anterior abdominal wall and the umbilical cord insertion at this gestational age is feasible. A cross-sectional study of 61 embryos-fetuses from 7 to 12 weeks of gestation was performed to observe the physiologic midgut hernia. This herniation was detected in 64% of the cases at 8 weeks, in 100% during weeks 9 and 10, and in 25% at 11 weeks' gestation. None of the fetuses studied at 12 weeks had a midgut herniation. Vaginal sonography of the well-dated fetus at 12 weeks can confirm the final development of the anterior abdominal wall.

Abdominal Muscles↗
PubMed1989

Is it really a placenta previa?

Transvaginal sonography was compared to the traditional transabdominal sonography for diagnosing placenta previa. There was no vaginal bleeding in the 55 women studied following vaginal examination. The exact location of the internal os was diagnosed in all women by the vaginal route, and only in 36 of the 55 by abdominal scanning. Transvaginal sonography correctly diagnosed 39 out of the delivered 45 women, whereas transabdominal sonography only did so in 20 of the 45 cases. These results suggest that transvaginal sonography for the diagnosis of placenta previa is safe and superior to transabdominal sonography.

False Positive Reactions↗
PubMed1988

The technique of transvaginal sonography with the use of a 6.5 MHz probe.

Ultrasonography has become an important tool in infertility and obstetric practice. Its use in gynecology, while effective, has been less. This article describes the use of a high-frequency 6.5 MHz probe specially designed for intravaginal use. The technique is presented, along with a description of its uses and findings by organ. Patient acceptance has been universal. Its high resolution makes this technique more useful in general gynecologic practice.

Fallopian Tubes↗
PubMed1988

Vaginal ultrasound for diagnosis of placenta previa.

Transvaginal sonography was compared with transabdominal sonography in 35 women with suspected placenta previa. The transvaginal sonographic technique did not result in vaginal bleeding in any of the patients. The internal os and its relationship to the location of the placenta were visualized by transvaginal sonography in all patients, but only in 24 patients (69%) by transabdominal sonography. Transvaginal sonography ruled out placenta previa in 13 cases thought to be placenta previa by abdominal sonography. The transvaginal diagnosis in these 13 patients was confirmed at delivery. Thirty-four of the 35 women have been delivered. The diagnosis at delivery confirmed the transvaginal sonographic diagnosis in 29/34 cases and the transabdominal diagnosis in 16/34. Transvaginal sonography did not predict the delivery diagnosis in five patients who were erroneously believed to have placenta previa by both sonographic techniques.

Female↗
PubMed1988

A close look at early embryonic development with the high-frequency transvaginal transducer.

Transabdominal sonography has been, for the past two decades, used as an effective diagnostic and research tool in obstetrics. It is predominantly used in the second and third trimesters of gestation. Its use in the first trimester is relatively limited and mostly diagnostic in nature. The introduction of the higher frequency transvaginal transducer probe, with its higher resolution of the images, opens new possibilities to study early gestation. We studied embryonic development in 38 well-dated and normal pregnancies. A well-defined intrauterine gestational sac could be seen at 4 weeks and 1 to 4 days of menstrual age. The beta-subunit of human chorionic gonadotropin level at this time was 450 to 750 mlU/ml. Structures such as the yolk sac, membranes, ventricular system in the brain, musculoskeletal system, and cord were described and illustrated. Textbooks and atlases were used for comparative purposes. High-resolution transvaginal sonography will facilitate first-trimester perinatology.

Embryo, Mammalian↗
PubMed1987

Reduction of the number of embryos in a multiple pregnancy: quintuplet to triplet.

The technique for reduction of the number of embryos was applied in a patient who conceived following IVF and transfer of six embryos. On the 10th week of gestation, the number of embryos was reduced from five to three by an U/S-guided intra-uterine procedure. Two healthy girls and a boy were delivered in the 36th week by cesarean section. No trace of the other two fetuses was found. The moral and technical aspects of partial preventive termination of multiple pregnancy are discussed.

Abortion, Induced↗
PubMed1987

Early treatment by plasmapheresis in a woman with multiple abortions and the rare blood group p.

Women with the rare blood group p are known to have an increased rate of abortions. The case of a 36-year-old woman is presented who had had 7 spontaneous abortions in the first trimester and no live child. When treated by plasma exchange begun early in pregnancy and continued until the 29th week, she delivered a normal child. Time to begin, amount and length of time necessary to continue plasma exchange in these patients are considered. In addition, the question of which fraction of the anti-PP1Pk could be responsible for abortion is discussed. To our knowledge, this is the first case of a woman of p phenotype with no live children but with multiple abortions treated by this method, which should be seriously considered in similar cases.

Abortion, Habitual↗
PubMed1987

Transvaginal ultrasonographic study of the fallopian tube.

The use of transabdominal/transvesical sonography in gynecologic diagnosis is limited by the physical properties of the transducers used as well as the lack of sufficient acoustic interfaces. Therefore, delicate tubal structures cannot be visualized adequately. Transvaginal application of a 6.5-MHz transducer probe (with a 10-mm crystal) enables the effective use of higher frequencies, enhancing resolution. This higher resolution improves picture quality and increases potential diagnostic power in evaluating the female pelvis in general and the fallopian tube in particular. This report presents the sonographic picture of the normal and pathologic tube. Tubal pathology should be described in terms of the tubal cavity, walls, and content, as well as location and mobility. The more frequently encountered clinical entities, such as the fluid-filled tube, tubo-ovarian inflammatory processes, and tubal gestation are discussed.

Fallopian Tube Diseases↗
PubMed1986

The effect of external stimuli on fetal behaviour.

The sensory receptors of the human fetus and their adequate stimulation are reviewed. Emphasis is put on the two main sensory routes through which the fetus may be stimulated: the hearing and the cutaneous senses. Most experimental and descriptive studies were done in these two well-defined areas. The core of the review deals with the description of sensory stimulation of the fetus as a function of the known behavioral states. It is postulated, and a series of experimental works cited in support, that reactions of the fetus to external stimuli, irrespective of the route through which they are presented, are subject to modulation by these states. It is proposed that an adequate stimulus in the normal, physiological range produces little or almost no effect in deep sleep (state 1 fetal) and does not change this state, whereas an inadequate stimulus which is strong ("painful") produces a definite change in state 1 fetal and is capable of triggering a change from state 1F to 2F (active sleep or rapid-eye-movement sleep).

Animals↗
PubMed1986

Postmenopausal tubo-ovarian abscess.

Tubo-ovarian abscess in postmenopausal women is a distinct and rare entity. The disease is usually diagnosed on the operating table and its high rate of postoperative complications and mortality commands special attention. By presenting our experience with four cases of tubo-ovarian abscess in postmenopausal women, we would like to re-emphasize the importance of including this disease in the differential diagnosis of the surgeon and the gynecologist. Early laparotomy is essential to reduce morbidity and mortality.

Abscess↗
PubMed1985

Effect of acute hypoxia on human fetal heart rate. The significance of increased heart rate variability.

The fetal heart rate response to acute hypoxemia was observed during an accidental drop in oxygen concentration inspired by the mother in labor. There was a marked increase in FHR variability in the early stage of hypoxia and also during the recovery phase. While an increase in fetal heart variability is generally considered to be a normal physiological event, it may also indicate a state of fetal hypoxemia associated with an intact fetal circulation, and should be treated with caution during labor.

Adult↗
PubMed1984

An epidemic-like appearance of congenital cystic hygroma.

Five fetuses with cystic hyroma were diagnosed in our department during a period of 5 months. Four of them were identified by an ultrasonic examination. No common causative factor was found to explain the appearance of such a rare anomaly in 5 cases over a very short period of time.

Female↗